What if a Heart player can affect someone's classpect. Like Witch changing say, Sylph of Rage to Maid of Mind. Or Thief consuming so much souls so that they are no longer a thief of heart but rather an amalgation of classpects.

… Huh. Altering someone’s Base Nature so much that they actually fit another Classpect better, I have no idea how Skaia would plan for this, if they would straight up give them the Classpect they’re going to change into eventually or if there could effectively be a Switch like that. I should point out though, Soul Amalgams like certain Sprites actually DO display a combination of Classpect Traits, think how Davepeta’s Shirt changes after fusing, it’s a mix of Time and Nepeta’s Dreamer Shirt (As she hadn’t ascended), thus indeed implying even Classpects merge when Souls merge, and mix with each other. So arguably, someone like Davepeta would be a Rogue of Time, a Rogue of Heart, a Knight of Time AND a Knight of Heart all at once.